These were imported from West Germany by Klepper  starting in the 1970s and discontinued when Klepper went bankrupt in 1981. TS stands for Tandem Sailor. We have seen two versions. The main difference that I have noticed is the upper deck was reshaped in the mid 70's with a wide lip added on the cockpit coaming for a spray cover. The  hull length, Keelson and seat configuration look the same.

    The slightly shorter fiberglass version of the more classic Klepper folding II Aerius series makes this hull perfect for sailing with BSD. We have one rebuilt and for sale here in Vermont. If you own one we can refurbish it & add a BSD sail rig for you.